angular events

時間 2019-11-11

原文原文鏈接

<!doctype html>
<html ng-app="app">
    <head>
    <meta charset="utf-8">
        <script src="./angular-1.5.8/angular.js"></script>
    </head>
    <body>
        <div ng-controller="ParentCtrl">                 
            <div ng-controller="SelfCtrl">                
                <a ng-click="click($event)">click me</a>
                <div ng-controller="ChildCtrl"></div>     
            </div>
            <div ng-controller="BroCtrl"></div>           
        </div>
    </body>
</html>
<script>
var phonecatControllers = angular.module('app',[]);
phonecatControllers.controller('SelfCtrl', function($scope) {
    $scope.click = function () {
        $scope.$broadcast('to-child', 'child');
        $scope.$emit('to-parent', 'parent');
    }
    $scope.$on('to-parent', function(event,data) {
        console.log('SelfCtrl to-parent', data);         //父級能獲得值
    });
    $scope.$on('to-child', function(event,data) {
        console.log('SelfCtrl to-child', data);         //父級能獲得值
    });
});
phonecatControllers.controller('ParentCtrl', function($scope) {
    $scope.$on('to-parent', function(event,data) {
        console.log('ParentCtrl to-parent', data);         //父級能獲得值
    });
    $scope.$on('to-child', function(event,data) {
        console.log('ParentCtrl to-child',data);         //子級得不到值
    });
});
phonecatControllers.controller('ChildCtrl', function($scope){
    $scope.$on('to-child', function(event,data) {
        console.log('ChildCtrl to-child',data);         //子級能獲得值
    });
    $scope.$on('to-parent', function(event,data) {
        console.log('ChildCtrl to-parent',data);         //父級得不到值
    });
});
phonecatControllers.controller('BroCtrl', function($scope){
    $scope.$on('to-parent', function(event,data) {
        console.log('BroCtrl to-parent',data);        //平級得不到值
    });
    $scope.$on('to-child', function(event,data) {
        console.log('BroCtrl to-child',data);        //平級得不到值
    });
});
</script>

Output:html

SelfCtrl to-child childapp
ChildCtrl to-child childcode
SelfCtrl to-parent parenthtm
ParentCtrl to-parent parentip

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